Next, I'll add a tiny bit of behavior to my User domain class.
接下来，我要添加一点点的行为给我的user域类。
I can display the contents of the directory because its user-read bit is set.
我可以显示该目录中的内容，因为已经设置了它的用户读位。
I can add and remove files from the directory, because its user-write bit is set.
我可以在该目录中添加和删除文件，因为已经设置了它的用户写位。
I have mentioned a little bit in last User Conference.
我曾在去年用户年会提及小部份。
I have mentioned a little bit in last User Conference.
我曾在去年用户年会提及小部份。
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